Phenyl-substituted cyclopentadienes are proved to form phenylated pyrylium cations in the presence of silver(I) perchlorate by insertion of an oxygen atom into the cyclopentadiene-ring. Three phenylated pyrylium compounds, [(Ph5C5O+)(ClO4-)]2(CH2Cl2) (1), Ag(ClO4)(H2O)(Ph4-HC5O+) (ClO4-) (2), and (Ph3H2C5O+)(ClO4-) (3) have been synthesized and characterized. A possible reaction pathway and formation mechanism of the pyrylium cation are proposed and discussed.

This paper describes three novel and distinctive organosilver(I) complexes with propeller ligand, hexaphenylbenzene (HPB), whose structures are controlled by selected solvents and anions. Treatment of HPB with AgClO4 and AgCF3SO3 in toluene gave, complexes [Ag4(HPB)(ClO4)4] 1 and [Ag2(HPB)(CF3SO3)2(toluene)] 2, respectively. The single-crystal X-ray analysis revealed that 1 contains 2-D sheet framework whereas 2 consists of 1-D chain structure. In both complexes the anions play the role of linkers instead of spacers in the construction of polymeric structures. In contrast, complex [Ag2(HPB)(ClO4)2(THF)2] 3, obtained by using tetrahydrofuran (THF) in place of toluene in the synthetic process of 1, exhibits a discrete dimer. The fundamentals of the synthesis of these complexes, influences of anions and solvents on their coordination networks, and physicochemical properties are discussed. The present findings may serve as a basis for understanding the construction of solid-state materials with designed architecture in crystal engineering. Crystallographic data are as follows. 1: C21H15Ag2Cl2O8, monoclinic, P21/c, a=10.543(2) Å, b=11.934(4) Å, c=16.884(3) Å, â=94.08(2)℃, Z=4. 2: C51H38-Ag2S2F6O6, monoclinic, C2/c, a=18.200(4) Å, b=16.831(7) Å, c=16.244(3) Å, â=110.96(2)℃, Z=8.3: C25H23AgClO5, monoclinic, P21/c, a=11.321(3) Å, b=12.511(4) Å, c=16.357(3) Å, â=99.98(2)℃, Z=4.

Polycyclic aromatic hydrocarbons (PAHs), due to the overall planarity of the molecules and their extended delocalized

For the purpose of exploring the structural relations of organometallic compounds to their organic components, a series of linear polycyclic aromatic hydrocarbons (PAHs) benzo[a]phenanthrene (L1), dibenz[a,h]anthracene (L2), benz[a]anthracene (L3), and naphtho[2,3-a]pyrene (L4), have been studied towards complexation with silver(I) ion. The crystal structures of [Ag3(L1)(ClO4)3(H2O)2] 1, [Ag2(L2)(ClO4)2] 2, [Ag2(L3)(ClO4)2(H2O)] 3, and [Ag2(L4)-(CF3SO3)2] 4 have been determined by single-crystal X-ray diffraction. Although each of these complexes exhibits distinct co-ordination behavior and different frameworks, all of them retain or partially keep the herringbonepacking pattern of their metal-free aromatic ligands in the crystalline state, and display similar two-dimensional multilayer architectures on a given plane. The fundamentals of the synthesis, possible formation mechanism of these polymeric networks and some properties are discussed.